Composition for preventing fogging or freezing on automobile windshields



Patented Jan. 30, 1951 UNITED STATES PATENT OFFICE COMPOSITION FOR PREVENTING FOGGING OR FREEZING ON AUTOMOBILE WIND- SHIELDS Robert A. Macklin, Toronto, Ontario, Canada No Drawing. Application July 23, 1948,

Serial No. 40,425

2 Claims. 1

The object of the present invention is to devise a composition which may be applied as a coating to Windshields of motor vehicles or other transparent surfaces to prevent the deposition of moisture thereon in the form of a mist or vapor with the danger, in cold weather of the mist or vapor freezing and preventing proper vision through the windshield.

This object is attained by forming a composition comprising the following ingredients:

Pounds 2 methyl 2, 4 pentanediol 86-90 Sodium Stearate 2 4-3 Water 6-10 2 methyl 2, 4 pentanediol is a product made by Shell Oil Co. of Canada, Limited, and sold under the designation hexylene glycol.

It is found, however, that best results are obtained if the said ingredients are employed in the following proportions by weight:

Pounds 2 methyl 2, 4 pentanediol 88 Sodium Stearate 2% Water 8% The variousingredients are thoroughly mixed together and then subjected to boiling at a temperature of approximately 200 Fahr. The mixture is then allowed to cool to about 130 Fahr., and is then poured into jars or suitable containers and allowed to gel.

I prefer, however, to add to the mixture before pouring it into the containers iso-bornylacetate of 15% concentration. This is for the purpose of giving the composition a distinctive color andfurther acts as a perfuming agent for the composition to hide any undesirable odour of the other ingredients,

ROBERT A. MACKLIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,213,368 Hibbert Jan. 23, 1917 1,394,774 Kuhn Oct. 25, 1921 1,556,714 Ridgely Oct. 13, 1925 2,292,097 Vollmer' Aug. 4, 1942 2,333,794 Jones Nov. 9, 1943 2,469,309 Morris et al May, 3, 1949 OTHER REFERENCES Condensed Chem. Dictionary, Gregory, 3rd.

ed., 1942, p. 131.

Hackh. Chem. Dictionary, 2nd. ed., 1937, pp. 454 and 726.

Lange, Handbook of Chem, Handbook Publishing Company, 1941, p. 396 (Handbook Publishers Company, Sandusky, Ohio). 

1. A COMPOSITION FOR PREVENTING FOGGING OR FREEEZING ON GLASS AND SIMILAR SURFACES COMPRISING 2-METHYL-2,4 PENTANEDIOL, SODIUM STERATE AND WATER IN THE PROPORTIONS OF 86 TO 90 LBS. OF THE FIRST, 2 1/2 TO 3LBS. TO THE SECOND AND 6 TO 10 LBS. OF WATER. 